If the Lions think any of these QBs are franchise QBs, they should draft him 2nd. If they don't think any are worthy of the 2nd pick, they probably aren't franchise QBs.
The Lions are in a good position to draft someone like Willis. They already have a good young OL in place, they have multiple 1st round picks the next two drafts, and they have Goff in place so Willis doesn't need to start immediately.